Drum for drying materials



Nov. 8, 1927. 1,648,542

J. CUYPERS DRUM FOR DRYING MATERIALS Filed July 16. 1926 Patented Nov. s;1e27.

UNITED STATES JEAN CUYPERS, OE UERDINGEN-ON-THE-RHINE. GERMANY.

DRUM FOR- DBYING MATERIALS.

Application filed July 16, 1926, Serial No. 122,937, and in Germany July 20, 1925.

My invention provides a rotary drying drum with improved internal distributing devices or carriers for the material to be dried, said carriers being arranged substan- 5 tially parallel to the drum axis and each composed of three equally spaced radial arms with flanges extending therefrom. The carriers are grouped, within the drum with their arms disposed in three series of parallel planes having a mutual angle of intersection of one hundred and twenty degrees.

Said arms, which are of equal length, may be bent up at the outerends to form flanges pointing in the direction of rotation of the drum.

The special construction, method of operation and advantages of the invention are hereinafter setforth with reference to the typical example'illustrated in the drawing which represents a diagrammatic section through a drying drum inaccorda'nce with my invention.

Reference 0 denotes the drum, which is of sheet metal or other suitable material, and is adapted to be rotated in the direction of the arrow 03. Inside the drum 0 are disposed carriers for the material, each of which, in cross section, has the form of a cross with ,three radial arms g provided, at their outer edges, with flanges z. Other carriers 6 arranged round the inner wall of the drum are shaped differently as shown.

The centre of each cross is situated at the apices of three equilateral triangles; and the arms Eq are disposed in rows alongthree series 0 parallel planes having a mutual angle of intersection of 120, the arrangement being such that, in all the planes of each series, the arms point in the same direction from their'central axes. That is to say, all the arms 9 in the series of parallel vertical planes point downwards from their axes; all the arms 9 in the series of parallel planes that slope upwardly to the right point upwardly in that direction; and all the arms 9 in the series of arallel planes that extend upwardly .to the eft point upwardl direction. At the same time, thesi es of the equilateral triangles formed by the intersect- 60. ing planes are double the length of the arms 9 of said crosses. This is represented in the figure by ter 2. The advantage of this arrangement is that, in each of the parallel planes, each in that the circle marked with the diame-- arm 9 of the length is is always succeeded by a gap of the same length.

The height of fall it of the material is that of a perpendicular drawn from the corner of a flange i to an arm of the adjacent cross.

During one revolution of the drum there are three falls of material in each group of three carriers 7, as indicated by the dotted llnes. In the case of the marginal carriers there are, for the most part, only two falls.

Consequently, in the example shown, there are altogether 108 falls during one revolution of the drum, a number considerably exceeding that occurring with any known distributing device of this kind for the same size of drum. The amount of .materal circulating in each group of adjacent carriers is no more than corresponds to the capacity of one carrier trough m.

The figure clearly shows that, in each triangular group of carriers, out of the three carrier troughs which face each other, only the one, m, which is facing upwards for the time being can contain material, because the flanges i are bent over so as to lead in the direction of rotation of the drum (arrow (1) If'this were not the case, then, with the drum rotating i'n'the direction indicated, the material would not fall direct, as it should do, from the trough I-III of the carrier a into the'trough I-II of the carrier 12 of the group a b a, but would fall past or along the arm II of that carrier to the trough I-III of the carrier 6 of the group a b b, and continue to do so until the arm II of the carrier I; assumed the horizontal position.

The flanged shape of the arms 9 enables the groups to triangular arrangement which increases the carrying capacity of the drum by comparison with known distributing devices.

Further, the invention aifords the additional advantage that the carrying capacity of the trough is increased by the flanged shape of the carrier arms.

I claim 1. In a rotary drying drum, a plurality of carriers for the material to be dried arranged substantially parallel to the'drum axis, each be advantageously disposed in of said carriers comprising three radial arms one hundred and twenty desubstantially grees apart, and flanges extending from the arms in the direction of rotation of the drum.

2. In a rotary drying drum, a plurality of Q a I 1,643,542

carriers for the material to be dried each cona mutual angle of one hundred and twenty stituted by three equally spaced radial arms degrees that the arms in all the planes of with flanges extending therefrom in the each series oint in the same direction from 10 same circular direction, said carriers being their central axes.

arranged substantially parallel to the drum In testimony whereof I have signed my axis with their arms so disposed in rows in name.

three series of parallel planes intersecting at JEAN CUYPERS. 

